Rechargeable battery pack



FIG. 1 is a perspective view of a detachable battery pack looking at the bottom thereof;

FIG. 2 is a perspective view of a detachable battery pack looking at the top thereof;

FIG. 3 is a left-side elevational view of the device shown in FIG. 2;

FIG. 4 is a front elevational view of the device shown in FIG. 2;

FIG. 5 is a right-side elevational view of the device shown in FIG. 2;

FIG. 6 is a rear elevational view of the device shown in FIG. 2;

FIG. 7 is a top plan view of the device shown in FIG. 1; and

FIG. 8 is a top plan view of the device shown in FIG. 2. 

The ornamental design for a rechargeable battery pack, as shown. 